<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>confirm</title>
  <script type="text/javascript">
    function rec() {
      var mymessage = confirm("你是女士吗?");
      if (mymessage == true) {
        document.write("你是女士!");
      } else {
        document.write("你是男士!");
      }
    }
  </script>
</head>

<body>
  <input name="button" type="button" onClick="rec()" value="点击我，弹出确认对话框" />
</body>

</html>